2. The Doppler Effect: Evidence of the Big Bang Theory
The apparent change in the frequency of a wave as the wave moves
toward or away from an observer.
A stationary object will make a sound travel in all directions, however if
the object is moving, what will happen to the waves in front of the object
compared to the waves behind the object?
Car is Stationary
3. The Doppler Effect: Evidence of the Big Bang Theory
The apparent change in the frequency of a wave as the wave moves
toward or away from an observer.
A stationary object will make a sound travel in all directions, however if
the object is moving, what will happen to the waves in front of the object
compared to the waves behind the object?
Car is Stationary
4. The Doppler Effect: Evidence of the Big Bang Theory
The apparent change in the frequency of a wave as the wave moves
toward or away from an observer.
A stationary object will make a sound travel in all directions, however if
the object is moving, what will happen to the waves in front of the object
compared to the waves behind the object?
Car is Moving
Observer
5. The Doppler Effect: Evidence of the Big Bang Theory
The apparent change in the frequency of a wave as the wave moves
toward or away from an observer.
A stationary object will make a sound travel in all directions, however if
the object is moving, what will happen to the waves in front of the object
compared to the waves behind the object?
Car is Moving
Observer
6. Just like sound…light is in the form of a wave
Sometimes when we observe certain spectra, the
absorption lines do not always line up as we might
expect.
The lines appear to shift towards the red or blue side
of the spectrum.
This is called a Doppler Shift caused by the Doppler effect.
